(a) A representative limit cycle oscillation in the floating potential, (b) and density, (c) PDF of the energy recovery time, and (d) XUV radiation.
(a), turbulent (b), and flow (c) fluctuation amplitude during L–H transition. Energy transfer between turbulence and shear flow (d) and normalized to turbulent fluctuation amplitude and energy recovery time (e). Data from 1.0–1.5 cm inside LCFS denoted by blue and red curves. Data taken 1 cm outside of LCFS in the SOL region denoted by green curve.
Hodograph of turbulent and flow energies during L-H transition.
Predator-prey model with fast power ramp up. Evolution of the turbulent, ZF, and mean flow (MF) amplitudes (a), the zero frequency ZF shearing (b), and normalized energy transfer (c). Model is described in detail in Ref. 22.
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